Add ConfigLoaded event to IPC, option to disable built-in notification (#1829)

* feat: config reload ipc event

* cleanups

* Rename and move the new config option

* rename to ConfigLoaded and emit at connection

---------

Co-authored-by: Ivan Molodetskikh <yalterz@gmail.com>

2 files changed, 40 insertions, 0 deletions

diff --git a/niri-ipc/src/lib.rs b/niri-ipc/src/lib.rs
index 737f1647..a1be86d2 100644
--- a/niri-ipc/src/lib.rs
+++ b/niri-ipc/src/lib.rs
@@ -1399,6 +1399,16 @@ pub enum Event {
         /// The new state of the overview.
         is_open: bool,
     },
+    /// The configuration was reloaded.
+    ///
+    /// You will always receive this event when connecting to the event stream, indicating the last
+    /// config load attempt.
+    ConfigLoaded {
+        /// Whether the loading failed.
+        ///
+        /// For example, the config file couldn't be parsed.
+        failed: bool,
+    },
 }
 
 impl FromStr for WorkspaceReferenceArg {
diff --git a/niri-ipc/src/state.rs b/niri-ipc/src/state.rs
index ef883021..3ba63a52 100644
--- a/niri-ipc/src/state.rs
+++ b/niri-ipc/src/state.rs
@@ -43,6 +43,9 @@ pub struct EventStreamState {
 
     /// State of the overview.
     pub overview: OverviewState,
+
+    /// State of the config.
+    pub config: ConfigState,
 }
 
 /// The workspaces state communicated over the event stream.
@@ -73,6 +76,13 @@ pub struct OverviewState {
     pub is_open: bool,
 }
 
+/// The config state communicated over the event stream.
+#[derive(Debug, Default)]
+pub struct ConfigState {
+    /// Whether the last config load attempt had failed.
+    pub failed: bool,
+}
+
 impl EventStreamStatePart for EventStreamState {
     fn replicate(&self) -> Vec<Event> {
         let mut events = Vec::new();
@@ -80,6 +90,7 @@ impl EventStreamStatePart for EventStreamState {
         events.extend(self.windows.replicate());
         events.extend(self.keyboard_layouts.replicate());
         events.extend(self.overview.replicate());
+        events.extend(self.config.replicate());
         events
     }
 
@@ -88,6 +99,7 @@ impl EventStreamStatePart for EventStreamState {
         let event = self.windows.apply(event)?;
         let event = self.keyboard_layouts.apply(event)?;
         let event = self.overview.apply(event)?;
+        let event = self.config.apply(event)?;
         Some(event)
     }
 }
@@ -244,3 +256,21 @@ impl EventStreamStatePart for OverviewState {
         None
     }
 }
+
+impl EventStreamStatePart for ConfigState {
+    fn replicate(&self) -> Vec<Event> {
+        vec![Event::ConfigLoaded {
+            failed: self.failed,
+        }]
+    }
+
+    fn apply(&mut self, event: Event) -> Option<Event> {
+        match event {
+            Event::ConfigLoaded { failed } => {
+                self.failed = failed;
+            }
+            event => return Some(event),
+        }
+        None
+    }
+}